조경시공과목 교육에 대한 학생들의 인식 분석

박재영,권진욱,Park, Jae-Young,Kwon, Jin-Wook 한국조경학회 2017 韓國造景學會誌 Vol.45 No.4

조경은 전문 직업 분야로서 전문 인력 양성에 교육의 초점을 맞추는데, 그 중 조경시공은 조경업계의 큰 축을 담당하는 한 분야이다. 그러므로 본 연구는 조경시공관련 수업 개선에 대한 기초 자료 제시를 목적으로, 조경학과 학생들의 관점에서 교육현황 및 교수법 등에 대한 인식을 조사하였다. 총 348명을 대상으로 '조경시공관련 수업의 인식'의 범주 하에 14개의 문항에 대한 설문을 시행하여 연구결과를 도출하였다. 조사결과, 학생들은 조경시공관련 수업이 학문적으로 중요하다고 인지하며, 학점 이수의 필요성을 가지나, 수업환경 및 과목 강의법에 만족하지 못하는 것으로 나타났다. 또한 수업의 내용을 실무에 바로 적용하기 어렵다는 인식과 '조경기사 자격증 시험'에 대비한 수업의 일환으로 인식하고 있었다. 강의에 대한 요구로는 현장실습 중심의 강의와 현장실습을 위한 다양한 프로그램 참여를 희망하는데, 이는 계획 설계 시공 관리로 이루어지는 인재관리형 수업의 필요성이 요구되는 것이라 하겠다. 또한, 현장실습과 관련하여 '다양한 기회의 제공', '실습환경의 처우 개선' 등과 같은 환경제공의 과제가 제시되었다. 본 연구결과는 조경시공분야 교육에 관한 연구나 논의가 미진한 현실에서 학생들의 입장을 분석하고, 향후 개선방향에 대하여 논의했다는 것에 연구의 의의를 가진다. 한편, 4년제 대학만을 대상으로 연구를 진행한 것에 대한 한계를 가지며, 향후 전문대학 및 대학원 교육과정의 조사를 포함한 총체적 연구와 외국 시공학 교육과정에 대한 사례연구가 필요할 것으로 판단된다. As a professional occupation, landscape education focuses on fostering professional human resources and is one of the major axes of the landscape industry. In this study, a survey of landscape students on their learning and pedagogics was conducted with the aim to present basic information for the improvement of teaching on landscape construction. A total of 348 people answered 14 questions in the category of the impression of landscape construction classes included in the questionnaire. The results showed that the students found landscape construction classes academically important and recognized the necessity for completing these classes, but they were not satisfied with the learning environments and pedagogics used in these classes. They found what they learned not readily applicable to actual practice and saw these classes as part of their preparations for the landscape engineer qualification test. Their demands in relation to the classes included field practice-oriented teaching and participation in various programs for field practice, which highlights the necessity for human resource management-oriented classes that cover planning, design, construction, and management. Challenges in relation to field practice included the provision of environment, for example offering a variety of opportunities and improving treatment in practice. This study has significance in that it analyzed the views of students and discussed directions for future improvement since there is a lack of studies and discussions about education in the field of landscape construction. This study also has a limitation that only four-year universities were included in the study. Comprehensive studies including investigating junior college and graduate school curricula and case studies of landscape construction curricula overseas are needed in the future.

안전관리 <재해손실이 건설경영에 미치는 영향>

박재영,Park, Jae-Young 한국건축시공학회 2002 한국건축시공학회지 Vol.2 No.2

과공정 Al-Si 합금에서의 초정 및 공정 Si 의 동시 미세화

박재영,이재상,나형용 ( Jae Young Park,Jae Sang Lee,Hyung Yong Ra ) 한국주조공학회 1995 한국주조공학회지 Vol.15 No.3

N/A It is well known what is impossible to refine primary and eutectic Si simultaneously by addition of both Cu-P and Sr(or Na). Because of the formation of compound Sr₃P₂(or Na₃P) in the melt, in the result, both effects disappear. In this study Al-Cu-P alloy that comprises AlP compounds inside is added in the melt with Sr simultaneously. As AlP compounds that act on nucleation sites of primary Si are not formed but added directly an the melt, it is difficult to form Sr₃P₂by reaction with Sr. Therefore it is possible to refine primary and eutectic Si simultaneously in the general casting process by use of Al-Cu-P alloy and Sr.

토끼 두개골 결손부의 골재생에 대한 poly(lactide-co-glycolide) (PLGA) 의 영향

박재영,황우진,정성념,김윤상,피성희,유형근,신형식,Park, Jae-Young,Hwang, Woo-Jin,Jeong, Seong-Nyum,Kim, Yun-Sang,Pi, Sung-Hee,You, Hyung-Keun,Shin, Hyung-Shik 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.2

Purpose: The purpose of this study is to histologically and histomorphometrically evaluate the effect of PLGA on bone regeneration compared with bone graft material. Methods: The experimental study was conducted in 10 rabbits with 2 different healing periods of 2 and 4 weeks. Following surgical exposure of the calvarium, 4 circular bone defects with a diameter of 4.6mm were formed. Rabbits were divided into control group, test groups I, and II. 10 defects assigned to the test group Ⅰ were grafted with Nu-oss and other 10 defects assigned to the test group II were grafted with PLGA. The rest of the defects were in the negative control group. At 2nd and 4th week after surgery, 10 rabbits were sacrificed through intracardiac perfusion and then specimens were obtained. Histological analysis was performed following staining with trichorme and transversal sectioning of the calvarial bone. Results: A group which used PLGA showed tissue reactions characterized by severe inflammation, rather than distinctive new bone formation. Conclusions: The present experimental investigations have failed to prove any beneficial effects of PLGA. PLGA used in this study exhibited foreign body reactions and a less favorable pattern of new bone formation in comparison to control group. Conclusion: PLGA did not function as scaffold. Further investigations of many types of micro PLGA that could improve its potential in GBR procedures are needed.

3차원 수치해석을 통한 개착터널내 단면변화구간의 손상미케니즘 연구

박재영,손정훈,박광림,오영석,Park, Jae-Young,Son, Jeong-Hun,Park, Kwang-Lim,Oh, Young-Seok 한국터널지하공간학회 2012 한국터널지하공간학회논문집 Vol.14 No.6

본 연구는 터널의 단면변화구간에서 발생한 손상 미케니즘에 대하여 이루어졌다. 이를 위해 단면변화 구간을 대상으로 다양한 현장조사 및 시험을 실시하였으며, 이를 바탕으로 2차원 및 3차원 수치해석을 수행하였다. 현장조사 및 시험 결과, 슬래브 손상에 대한 직접적인 원인을 찾을 수 없었으며, 2차원 수치해석을 수행한 결과 기준 안전율(1.0)을 만족하는 것으로 분석되었다. 추가로 수행한 3차원 수치해석 결과, 기둥 간격의 변화에 따라 슬래브 휨응력 변화를 전달시키지 못해 손상이 발생한 것으로 분석되었다. 보강을 위해 터널내 기둥을 추가하는 방안을 적용하였으며 그 결과, 상부 슬래브 비틀림 형상이 완화되어 보강 효과를 확인할 수 있었다. 단면 변화 구간의 경우 2차원 뿐만 아니라, 3차원으로 영향범위를 고려하여 설계에 반영한다면, 합리적이고 안정적으로 건설 및 유지관리가 가능할 것으로 판단된다. 추후에는 개착터널내 단면변화 구간에서 구조물에 영향을 최소화할 수 있는 보강방안에 대해 연구를 계속하고자 한다. This study made progress about Demage Mechanism of Transition Section in Cut and Cover Tunnel. For this study, Inspection and test was carried out about Transition Section. After this process, Numerical Analysis was accomplished by 2D, 3D. A result of inspection and test, It couldn't find the reason why the upper slab Demage was detected. So 2D Numerical Analysis was conducted. It was analyzed that the Safety Factor(1.0) was satisfied in 2D. But, the result of 3D Numerical Analysis, The reason was found that the Demage on upper slab was caused by moment change. The Moment was changed by column interval transition. For Retrofitting, Column was added under slab in tunnel. It was found that the addition column decreased upper slab deformation. After this study, It could be find that are important 3D Numerical Analysis as well as 2D Numerical Analysis in case of Transition Section. This Study can help developing construction and maintenance about Tunnel. Finally, It's going to study Retrofitting plans which have minimum influence of Transition Section in Cut and Cover Tunnel.

맥문동약침액(麥門冬藥鍼液)이 Streptozotocin으로 유발된 흰쥐의 당뇨병에 미치는 영향

박재영,박희수,Park, Jae-Young,Park, Hea-Su 대한약침학회 2000 Journal of pharmacopuncture Vol.3 No.2

This study was carried out to investigate the effects of Liriopis Tuber Herbal-Acupuncture on Diabetes Mellitus induced by streptozotocin in rat. Body weight, serum insulin, glucose, triglyceride, HDL cholesterol, free cholesterol and total protein were measured in streptozotocin induced diabetic rat injected with Liriopis Tuber Herbal-Acupuncture solution at Pisu(BL20) respectively for 30 days. In order to study the effects of Liriopis Tuber Herbal-Acupuncture at Pisu(BL20) on Diabetes Mellitus induced by Streptozotocin in rat, The groups were divided into five groups; Normal group(non treated group), N.-Saline group(administration of injection with normal saline at BL20 in 30 days after streptozotocin injection), Control group(non treated group after streptozotocin injection), H. Acup. group (administration of Liriopis Tuber Herbal-Acupuncture at BL20 in 30 days after streptozotocin injection), and Acup. group (administration of acupuncture at BL20 in 30 days after streptozotocin injection). The results obtained were summarized as follows; 1. As compared with Control group, there wae no significant tendency to diminish the rate of weight loss in H. - Acup. group. 2. As compared with Control group, there wae signiticant increase of serum insulin level in H. -Acup. group. 3. As compared with Control group, there was decrease of glucose level in H.- Acup. group. 4. As compared with Control group, there was decrease of triglyceride level in H. - Acup. group. 5. As compared with Control group, trere wae increase of HDL cholesterol level in H. - Acup. group. 6. As compared with Control group, there was significant increase of free cholesterol level in H. - Acup. group. 7. As compared with Control group, there was Increase of total protein level in H. - Acup. group. According to above mentioned results, Liriopis Tuber Herbal-Acupuncture was expected to be effective in treatment of Diabetes Mellitus and its complications.

홍화자약침액(紅花子藥鍼液)이 수은(水銀)에 의한 간세포(肝細胞) 손상(損傷)에 미치는 영향(影響)

박재영,윤현민,장경전,송춘호,안창범,Park, Jae-young,Youn, Hyoun-min,Jang, Kyung-jeon,Song, Choon-ho,Abn, Chang-beobm 대한침구의학회 2002 대한침구의학회지 Vol.19 No.5

Objective : This study was undertaken to examine whether Carthami Semen aquacupuncture (CSA) exerts protective effect against Hg-induced cell injury in rabbit liver. Methods : The cell injury was evaluated by ALT activity and lipid peroxidation was estimated by measuring malondialdehyde (MDA). Results : Hg caused an increase of ALT activity and lipid peroxidation in a dose-dependent-manner over concentrations of 0.1-1 mM, which were prevented by addition of 0.005% CSA. The protective effect of CSA was dose-dependent in concentration range of 0.001 to 0.01%. The increase of ALT activity and lipid peroxidation induced by 0.5 mM Hg were almost completely decreased by addition of 0.01% CSA. When the liver tissues were exposed to 0.5 mM Hg, GSH content was decreased, which was significantly restored by 0.01% CSA. 0.5 mM Hg caused decrease in the amount of total and nonprotein sulfhydryl groups, and 0.01% CSA prevented Hg-induced reduction of nonprotein sulfhydryl group but not protein sulfhydryl group. Conclusions : These results suggest that CSA exerts protective effect against Hg-induced cell injury by antioxidant action resulting from enhancement of nonprotein sulfhydryl group content including GSH in liver.

인삼의 산소중독 보호효과에 관한 실험적 연구

박재영,이상일,윤덕로,Park, Jae-Young,Lee, Sang-Il,Yun, Dork-Ro 대한예방의학회 1989 Journal of Preventive Medicine and Public Health Vol.22 No.2

인삼의 산소중독에 대한 보호효과를 평가하고자 마우스 110마리를 100% $O_2$ 5ATA에 폭로시켜, 인삼추출액 투여 유무에 따르는 사망소요시간 연장의 변화를 관찰하여 다음과 같은 결과를 얻었다. 1. 인삼추출액을 경구투여한 마우스군이 투여치 않은 대조군보다 산소중독에 의한 사망소요시간이 더 연장됨을 관찰하였다. 즉 인삼추출액 0.15cc 1회 경구투여군의 사망소요시간은 $169{\pm}41.4$분으로 인삼을 투여치 않은 군의 $145.3{\pm}32.5$분보다 통계적으로 유의하게 연장되었다(p<0.05). 또한 인삼추출액 0.15cc를 3일간 매일 경구투여한 군의 사망소요시간은 $207.6{\pm}40.5$분으로 인삼을 투여치 않은 대조군의 $156.7{\pm}31.8$분보다 매우 유의하게 연장되었으며(p<0.01), 매일 0.15cc씩 7일간 경구투여한 군의 사망소요시간은 $220.7{\pm}52.2$분으로 인삼을 투여치 않은 대조군의 $143.0{\pm}22.6$분보다 매우 유의하게 연장된 것을 관찰할 수 있었다(p<0.01). 2. 인삼투여일수에 따른 사망소요시간 비교에 있어서는 인삼추출액 0.15cc를 1회 경구투여한 군에 비해 0.15cc를 1회 경구투여한 군에 비해 0.15cc씩 3일간 매일 투여한 군이 산소중독에 의한 사망소요시간이 유의하게 연장되었으나(p<0.05) 0.15cc씩 7일간 매일 투여한 군은 산소중독에 의한 사망소요시간이 다소 연장되기는 하였으나 통계적으로 유의한 차이는 없었다(p>0.05). 이는 인삼의 산소중독에 대한 보호효과는 7일 이내의 투여의 경우, 3일이상 투여해도 투여기간 연장에 따른 더 이상의 보호효과는 기대할 수 없음을 시사해 주고 있다. The protective effects of Panax Ginseng extract to oxygen toxicity of mice were studied under 5 ATA hyperbaric oxygen atmosphere. The findings observed are as follows: 1) Administration of Ginseng water extract manifested the prolonging survival time of mice to oxygen toxicity by hyperbaric oxygen atmosphere. After 18 hours of single Ginseng water extract administration and three days, seven days of consecutive Ginseng water extract administration showed the protective effect against oxygen toxicity. 2) Three days and seven days of consecutive Ginseng water extract administration showed the more efficient protective effect than single Ginseng Water extract administration. 3) Seven days of consecutive Ginseng water extract administration did not showed the more efficient protective effect than three days of consecutive Ginseng water extract administration.

안전관리<안전을 고려한 대공간 구조물 시공법>

박재영,Park, Jae-Young 한국건축시공학회 2002 한국건축시공학회지 Vol.2 No.3

초고온가스로 압력용기용 Gr. 91 강의 장시간 크리프 수명 예측 방법 개선

박재영,김우곤,김선진,김민환,Park, Jae-Young,Kim, Woo-Gon,EKAPUTRA, I.M.W.,Kim, Seon-Jin,Kim, Min-Hwan 한국압력기기공학회 2014 한국압력기기공학회 논문집 Vol.10 No.1

Gr. 91 steel is used for the major structural components of Generation-IV reactor systems, such as a very high temperature reactor(VHTR) and sodium-cooled fast reactor(SFR). Since these structures are designed for up to 60 years at elevated temperatures, the prediction of long-term creep life is important for a design application of Gr. 91 steel. In this study, a number of creep rupture data were collected through world-wide literature surveys, and using these data, the long-term creep life was predicted in terms of three methods: the single-C method in Larson-Miller(L-M) parameter, multi-C constant method in the L-M parameter, and a modified method("sinh" equation) in the L-M parameter. The results of the creep-life prediction were compared using the standard deviation of error value, respectively. Modified method proposed by the "sinh" equation revealed better agreement in creep life prediction than the single-C L-M method.